Limit control device for screwing depth of self-tapping screw

Abstract

The utility model belongs to the field of self-tapping screw screwing-in depth limiting control, particularly relates to a self-tapping screw screwing-in depth limiting control device, and aims to solve the problems that when an existing self-tapping screw is screwed in, no limiting mechanism exists, the screwing-in depth of the self-tapping screw cannot be accurately controlled, and rotation operation is needed when the self-tapping screw is excessively screwed in, so that the screw-in depth of the self-tapping screw cannot be accurately controlled. In order to solve the problems that the clamping force of self-tapping screws is easy to reduce, the slipping risk exists, the consistency is difficult to guarantee due to manual gradual screwing debugging, and the assembling efficiency is low, the following scheme is provided: the self-tapping screw assembling machine comprises an outer frame assembly, a lifting assembly, a push-pull assembly and an electric control assembly, through an automatic limiting device composed of the lifting assembly, the push-pull assembly and the electrical control assembly, the screwing depth of the self-tapping screw is accurately controlled, the reserved length of the other side of the self-tapping screw can be effectively guaranteed, meanwhile, four stations are arranged, two sets of products can be controlled at a time, operation of operators is facilitated, and the production efficiency is improved. And the production and assembly efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-tapping screw screwing-in depth limit control, in particular to a self-tapping screw screwing-in depth limit control device. Background Art

[0002] In some equipment or structural designs, a common connection mechanism is to screw in a self-tapping screw halfway and then hang a spring on it to reduce shock or buffer. However, the existing self-tapping screw screwing method is mostly to use a screwdriver or an electric screwdriver to first screw in a part, then check the assembly effect, and then adjust it as needed. The disadvantages are: it is difficult to control the screwing depth of the self-tapping screw, and it is impossible to accurately control the reserved length of one end of the self-tapping screw hanging spring. Sometimes, in order to ensure the reserved length of the self-tapping screw, it is necessary to adjust back and forth manually, which is inefficient.

[0003] The prior art has the following problems:

[0004] When the self-tapping screws are screwed in, there is no limit mechanism, and the screwing depth of the self-tapping screws cannot be accurately controlled. When the self-tapping screws are screwed in too much, a rotating operation is required, which can easily reduce the bite force of the self-tapping screws and there is a risk of slipping. It is difficult to ensure consistency when screwing in and debugging step by step manually, and the assembly efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to solve the problems in the prior art that when the self-tapping screws are screwed in, there is no limit mechanism, the screwing depth of the self-tapping screws cannot be accurately controlled, when the self-tapping screws are screwed in excessively, a rotating operation is required, which easily reduces the bite force of the self-tapping screws and there is a risk of slipping. It is difficult to ensure consistency when screwing in and debugging step by step manually, and the assembly efficiency is low. A limit control device for the screwing depth of the self-tapping screws is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A limit control device for the screwing depth of a self-tapping screw, comprising an outer frame assembly, a lifting assembly, a push-pull assembly and an electrical control assembly, the outer frame assembly comprising a bottom plate and a top plate, one side of the top of the bottom plate is fixedly connected to a back plate, one side of the top plate is fixedly connected to one side of the back plate, two first guide columns are fixedly arranged on the top of the bottom plate, two first support columns, two second support columns, two second guide columns, a support plate and a first limit seat are fixedly arranged on the top of the bottom plate, a second limit seat is arranged on the first limit seat, the two second guide columns are connected by a fixing sheet, the first limit seat is fixedly arranged on the top of the bottom plate, the second limit seat is fixedly arranged on the top of the first limit seat, a first component is placed on the first limit seat, a second component is placed on the second limit seat, and a support plate is fixedly arranged on the top of the bottom plate;

[0008] The lifting assembly is connected to the outer frame assembly through the first guiding column for lifting;

[0009] The pushing and pulling assembly is fixed on the lifting assembly for pushing and pulling;

[0010] The electrical control assembly is fixed on the outer frame assembly for control.

[0011] In a possible design, the lifting assembly includes a lifting plate, a first cylinder, and two guide sleeves. One side of the first cylinder is fixedly connected to one side of the top plate. Guide holes are respectively formed at both ends of the lifting plate, and the two guide sleeves are respectively fixedly connected to the inner walls of the two guide holes. The telescopic part of the first cylinder is fixedly connected to the top of the lifting plate, and the outer side of the first guiding column is slidably connected to the inner wall of the guide sleeve.

[0012] In a possible design, the pushing and pulling assembly includes a second cylinder, a third cylinder, a sliding seat, two step screws, and two spacer posts. Two first limit pieces and two second limit pieces are fixed on the sliding seat by screws. The second cylinder, the third cylinder, and the step screws are all fixed to the bottom of the lifting plate. Two through holes are formed in the sliding seat, and two second guiding columns are located in the two through holes. The telescopic parts of the second cylinder and the third cylinder are both fixedly connected to one side of the sliding seat. Strip-shaped holes are respectively formed at both ends of the sliding seat, and the bottom ends of the two step screws are respectively located in the two strip-shaped holes. The two spacer posts are respectively fixedly sleeved on the two step screws, and the spacer posts are located between the lifting plate and the sliding seat.

[0013] In a possible design, the electrical control assembly includes a voltage regulator, a two-position five-way solenoid valve, a power supply board, a T-shaped three-way joint, a Y-shaped three-way joint, a second throttle valve, and a first throttle valve. The two-position five-way solenoid valve is connected to the power supply board through a wire. The voltage regulator is fixed on the top plate. The power supply board is fixed on the bottom plate by four single-headed stud bolts. One side of the two-position five-way solenoid valve is fixedly connected to one side of the back plate. The voltage regulator, the two-position five-way solenoid valve, the T-shaped three-way joint, the Y-shaped three-way joint, the second throttle valve, the first throttle valve, the first cylinder, the second cylinder, and the third cylinder are sequentially connected through air pipes.

[0014] In a possible design, a power switch for controlling the power supply is arranged on the power supply board and is electrically connected.

[0015] In a possible design, a power indicator light is arranged on the power supply board and is electrically connected.

[0016] In a possible design, self-tapping screws are provided on both the first limit piece and the second limit piece.

[0017] In the present application, the power switch controls the two-position five-way solenoid valve, the voltage regulator controls the working air pressure of all cylinders, the first throttle valve controls the speed of the first cylinder, and the second throttle valve controls the speed of the second cylinder and the third cylinder. By adjusting the first throttle valve and the second throttle valve, the push-out speed of the first cylinder is slightly slower than the push-out speed of the second cylinder and the third cylinder, and the pull-back speed of the first cylinder is slightly faster than the pull-back speed of the second cylinder and the third cylinder. Before use, connect the external air pressure and set the air pressure of the voltage regulator. For example, with an external input air pressure of 0.8Mpa, the voltage regulator Taking the air pressure of 0.45Mpa as an example, the first cylinder is in the push-out state, the second cylinder and the third cylinder are in the pull-back state, the power board is powered by DC12V, the power indicator light comes on, the first component is placed in the first limit seat, the second component is placed in the second limit seat, the power switch is pressed, the telescopic parts of the second cylinder and the third cylinder push the sliding seat to move, and then drive the first limit plate and the second limit plate to extend to the specified position, and at the same time, the lifting plate is pulled back by the telescopic part of the first cylinder, driving the push-pull assembly to move up to the set height.

[0018] The self-tapping screws are screwed into the first component and the second component at one time using an electric screwdriver, and the screwing depth of the self-tapping screws is limited by the first limit plate and the second limit plate.

[0019] Release the power switch, the first cylinder presses down the lifting plate, driving the push-pull assembly to move down about 0.5mm, releasing the locking force of the self-tapping screw and the limit plate, and at the same time, the telescopic parts of the second and third cylinders telescope back and pull the sliding seat, thereby driving the first limit plate and the second limit plate to return to the starting position, taking out the first component and the second component, and completing a round of operation. The rising and falling distances of the lifting assembly are 0.5mm respectively, and the pushing and pulling distances of the push-pull assembly are 10.0mm respectively, which can also be adjusted according to actual conditions. Through the automatic limit device, the screw-in depth of the self-tapping screw is accurately controlled, which can effectively ensure the reserved length on the other side of the self-tapping screw, and solve the problem of poor control of the screw-in depth of the automatic screw in some occasions and the problem of not being able to screw in place in one operation. At the same time, combined with actual production, four workstations are set up, which can control two groups of products at one time, which is convenient for the operation of the operator and greatly improves the efficiency of production and assembly.

[0020] The beneficial effects of the present invention are:

[0021] In the utility model, the limit control device for the screwing depth of the self-tapping screw is used to pull back the lifting plate through the lifting assembly and the telescopic part of the first cylinder, so as to drive the push-pull assembly to move up to the set height, so as to facilitate the adjustment of the height of the lifting plate;

[0022] In the present utility model, for the described limiting control device for the screwing-in depth of a self-tapping screw, through a push-pull assembly, the telescopic movement of the telescopic parts of the second cylinder and the third cylinder drives the sliding seat to move, and then drives the first limiting piece and the second limiting piece to extend to a specified position, facilitating the pushing out of the first limiting piece and the second limiting piece.

[0023] In the present utility model, for the described limiting control device for the screwing-in depth of a self-tapping screw, through an electrical control assembly, a voltage regulator controls the working air pressure of all cylinders, a first throttle valve controls the speed of the first cylinder, and a second throttle valve controls the speeds of the second cylinder and the third cylinder. By adjusting the first throttle valve and the second throttle valve, the pushing-out speed of the first cylinder is slightly slower than that of the second cylinder and the third cylinder, and the pulling-back speed of the first cylinder is slightly faster than that of the second cylinder and the third cylinder.

[0024] In the present utility model, the automated limiting device composed of a lifting assembly, a push-pull assembly, and an electrical control assembly accurately controls the screwing-in depth of the self-tapping screw, can effectively ensure the reserved length on the other side of the self-tapping screw. At the same time, four workstations are set, and two groups of products can be controlled at one time, which not only facilitates the operation of the operators but also greatly improves the production and assembly efficiency. Description of the Drawings

[0025] Figure 1 It is a front view structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0026] Figure 2 It is a side view structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0027] Figure 3 It is a first partial structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0028] Figure 4 It is a second partial structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0029] Figure 5 It is a third partial structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0030] Figure 6 It is a fourth partial structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0031] Figure 7 It is a fifth partial structural schematic diagram of a limiting control device for the screwing-in depth of a self-tapping screw proposed by the present utility model;

[0032] Figure 8 Partial structural separation schematic diagram of a limit control device for the screwing depth of self-tapping screws proposed by the present utility model.

[0033] In the figure: 1, bottom plate; 2, first guiding column; 3, lifting plate; 4, back plate; 5, top plate; 6, support plate; 7, first limit seat; 8, second limit seat; 9, sliding seat; 10, pressure regulator; 11, two-position five-way solenoid valve; 12, T-shaped three-way joint; 13, first throttle valve; 14, second throttle valve; 15, Y-shaped three-way joint; 16, air pipe; 17, first support column; 18, second support column; 19, second guiding column; 20, fixing piece; 21, first cylinder; 22, guide sleeve; 23, first limit piece; 24, second limit piece; 25, second cylinder; 26, third cylinder; 27, stepped screw; 28, spacer column; 29, single-headed stud; 30, power supply board; 31, power indicator light; 32, power switch; 33, wire; 34, first component; 35, second component; 36, self-tapping screw. Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0035] Embodiment 1

[0036] Refer to Figure 1-8 , a limit control device, including: a bottom plate 1, and then a back plate 4 is fixed to one side of its top by welding or bolting. Next, one side of the top plate 5 is fixedly connected to the other side of the back plate 4 to ensure the stability of the entire outer frame.

[0037] On the top of the bottom plate 1, two first guiding columns 2 are installed, which will serve as the sliding tracks of the lifting assembly. At the same time, two first support columns 17, two second support columns 18 and two second guiding columns 19 are installed. These support columns and guiding columns are fixed to the bottom plate 1 by welding or bolting to enhance the structural strength. The second guiding columns 19 are connected by a fixing piece 20 to enhance their overall stability.

[0038] At the central position on the top of the bottom plate 1, a first limit seat 7 is installed, and a second limit seat 8 is installed thereon. These two limit seats are used to place the parts to be processed, namely the first component 34 and the second component 35. In addition, a support plate 6 is installed to provide additional support.

[0039] One side of the first cylinder 21 is fixedly connected to the top plate 5 to ensure the stable operation of the first cylinder 21. Guide holes are provided at both ends of the lifting plate 3, and guide sleeves 22 are installed in each guide hole. The guide sleeves 22 are slidably connected to the outer side of the first guide posts 2 to ensure the stability of the lifting plate 3 during the lifting process.

[0040] The telescopic part of the first cylinder 21 is fixedly connected to the top of the lifting plate 3. By controlling the telescopic movement of the first cylinder 21, the lifting plate 3 can be driven to move up and down.

[0041] At the bottom of the lifting plate 3, a second cylinder 25, a third cylinder 26 and two step screws 27 are fixedly installed. Two first limit pieces 23 and two second limit pieces 24 are fixed to the sliding seat 9 by screws.

[0042] Two through holes are provided on the sliding seat 9 for the two second guide posts 19 to pass through to ensure the stability of the sliding seat 9 in the horizontal direction. The telescopic parts of the second cylinder 25 and the third cylinder 26 are fixedly connected to one side of the sliding seat 9. By controlling the telescopic movement of the second cylinder 25 and the third cylinder 26, the sliding seat 9 can be driven to move.

[0043] Strip-shaped holes are provided at both ends of the sliding seat 9. The bottom ends of the two step screws 27 are respectively inserted into the strip-shaped holes and are fixedly sleeved on the step screws 27 through spacer posts 28.

[0044] The pressure regulator 10 is fixed on the top plate 5. The power supply board 30 is fixed on the bottom plate 1 by four single-headed studs 29. The power switch 32 and the power indicator lamp 31 are installed on the power supply board 30 and are electrically connected through wires 33 to control the power supply of the entire device.

[0045] One side of the two-position five-way solenoid valve 11 is fixedly connected to the back plate 4 and is connected to the power supply board 30 through a wire 33. The pressure regulator 10, the two-position five-way solenoid valve 11, the T-shaped three-way joint 12, the Y-shaped three-way joint 15, the second throttle valve 14, the first throttle valve 13, the first cylinder 21, the second cylinder 25, and the third cylinder 26 are sequentially connected through an air pipe 16 to form a complete air circuit system.

[0046] This application is used in the field of self-tapping screw screwing depth limit control and can also be used in other fields applicable to this application.

[0047] Embodiment 2

[0048] Reference Figure 1-8 On the basis of Embodiment 1, an improvement is made: A device for limiting the screwing depth of self-tapping screws is applied in the field of self-tapping screw screwing depth limit control.

[0049] On the first limiting piece 23 and the second limiting piece 24, self-tapping screws 36 are installed according to actual needs. These self-tapping screws 36 will be used to screw into the parts to be processed. Through the first limiting piece 23 and the second limiting piece 24, the screwing depth of the self-tapping screws can be accurately controlled.

[0050] Among them, the first air cylinder 21, the second air cylinder 25, the third air cylinder 26, the pressure regulator 10, the five-port two-position solenoid valve 11, the power supply board 30, the power indicator lamp 31, the power switch 32, the first throttle valve 13 and the second throttle valve 14 are all prior arts, and their working principles belong to common knowledge, so they will not be elaborated here and can be selected according to needs.

[0051] However, as is well known to those skilled in the art, the working principles and wiring methods of the first air cylinder 21, the second air cylinder 25, the third air cylinder 26, the pressure regulator 10, the five-port two-position solenoid valve 11, the power supply board 30, the power indicator lamp 31 and the power switch 32 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make arbitrary selections according to their needs or convenience.

[0052] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A self-tapping screw penetration depth limit control device, characterized in that: The invention comprises an outer frame assembly, a lifting assembly, a push-pull assembly and an electrical control assembly. The outer frame assembly comprises a bottom plate (1) and a top plate (5). One side of the top of the bottom plate (1) is fixedly connected to a back plate (4). One side of the top plate (5) is fixedly connected to one side of the back plate (4). Two first guide columns (2) are fixedly arranged on the top of the bottom plate (1). Two first support columns (17), two second support columns (18), two second guide columns (19), a support plate (6) and A first limiting seat (7), a second limiting seat (8) is arranged on the first limiting seat (7), two second guide columns (19) are connected via a fixing plate (20), the first limiting seat (7) is fixedly arranged on the top of the base plate (1), the second limiting seat (8) is fixedly arranged on the top of the first limiting seat (7), a first component (34) is placed on the first limiting seat (7), a second component (35) is placed on the second limiting seat (8), and a support plate (6) is fixedly arranged on the top of the base plate (1); The lifting component is connected to the outer frame component through a first guide column (2) for lifting; The push-pull assembly is fixed on the lifting assembly for pushing and pulling; The electrical control assembly is fixed on the outer frame assembly for controlling.

2. A self-tapping screw screwing depth limit control device according to claim 1, characterized in that: The lifting assembly comprises a lifting plate (3), a first cylinder (21) and two guide sleeves (22); one side of the first cylinder (21) is fixedly connected to one side of a top plate (5); guide holes are respectively provided at both ends of the lifting plate (3); the two guide sleeves (22) are respectively fixedly connected to the inner walls of the two guide holes; the telescopic portion of the first cylinder (21) is fixedly connected to the top of the lifting plate (3); and the outer side of the first guide column (2) is slidably connected to the inner wall of the guide sleeve (22).

3. A self-tapping screw screwing depth limit control device according to claim 1, characterized in that: The push-pull assembly comprises a second cylinder (25), a third cylinder (26), a sliding seat (9), two step screws (27) and two spacer columns (28); two first limit plates (23) and two second limit plates (24) are fixed on the sliding seat (9) by screws; the second cylinder (25), the third cylinder (26) and the step screw (27) are all fixed to the bottom of the lifting plate (3); two through holes are provided on the sliding seat (9); two second guide columns (19) are located in the two through holes; the telescopic parts of the second cylinder (25) and the third cylinder (26) are fixedly connected to one side of the sliding seat (9); strip holes are provided at both ends of the sliding seat (9); the bottom ends of the two step screws (27) are respectively located in the two strip holes; the two spacer columns (28) are respectively fixedly sleeved on the two step screws (27); and the spacer column (28) is located between the lifting plate (3) and the sliding seat (9).

4. A self-tapping screw penetration depth limit control device according to claim 1, characterized in that: The electrical control assembly comprises a voltage regulator (10), a two-position five-way solenoid valve (11), a power supply board (30), a T-type three-way connector (12), a Y-type three-way connector (15), a second throttle valve (14) and a first throttle valve (13); the two-position five-way solenoid valve (11) is connected to the power supply board (30) via a wire (33); the voltage regulator (10) is fixed on the top plate (5); the power supply board (30) is fixed on the bottom plate (1) via four single-head studs (29); one side of the two-position five-way solenoid valve (11) is fixedly connected to one side of the back plate (4); the voltage regulator (10), the two-position five-way solenoid valve (11), the T-type three-way connector (12), the Y-type three-way connector (15), the second throttle valve (14), the first throttle valve (13), the first cylinder (21), the second cylinder (25) and the third cylinder (26) are connected in sequence via an air pipe (16).

5. A self-tapping screw screwing depth limit control device according to claim 4, characterized in that: The power board (30) is provided with a power switch (32) for controlling the power supply and is electrically connected.

6. A self-tapping screw penetration depth limit control device according to claim 5, characterized in that: The power board (30) is provided with a power indicator light (31) and is electrically connected.

7. A self-tapping screw screwing depth limit control device according to claim 3, characterized in that: The first limiting plate (23) and the second limiting plate (24) are both provided with self-tapping screws (36).

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